From e7f9487800ec05f42da40f5c70dddc64b0aa8e94 Mon Sep 17 00:00:00 2001
From: dfighter1985 <devnull@localhost>
Date: Wed, 17 Sep 2014 16:17:41 +0200
Subject: [PATCH] Instead of mouse move event, use the itemChange handler to
 move the links.

---
 .../src/plugins/gui_editor/expression_node.cpp   | 16 ++++++++++++----
 .../src/plugins/gui_editor/expression_node.h     |  3 ++-
 2 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/code/studio/src/plugins/gui_editor/expression_node.cpp b/code/studio/src/plugins/gui_editor/expression_node.cpp
index 8f3425a37..8a0ef774b 100644
--- a/code/studio/src/plugins/gui_editor/expression_node.cpp
+++ b/code/studio/src/plugins/gui_editor/expression_node.cpp
@@ -101,7 +101,7 @@ private:
 ExpressionNode::ExpressionNode( const QString &name, int slotCount, QGraphicsItem *parent ) :
 QGraphicsItem( parent )
 {
-	setFlags( QGraphicsItem::ItemIsSelectable | QGraphicsItem::ItemIsMovable );
+	setFlags( QGraphicsItem::ItemIsSelectable | QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemSendsScenePositionChanges );
 
 	m_w = 100;
 	m_h = 100;
@@ -323,7 +323,17 @@ QString ExpressionNode::build() const
 	return result;
 }
 
-void ExpressionNode::mouseMoveEvent( QGraphicsSceneMouseEvent *e )
+QVariant ExpressionNode::itemChange( GraphicsItemChange change, const QVariant &value )
+{
+	if( change == ItemScenePositionHasChanged )
+	{
+		onNodeMove();
+	}
+
+	return QGraphicsItem::itemChange( change, value );
+}
+
+void ExpressionNode::onNodeMove()
 {
 	for( int i = 0; i < m_links.count(); i++ )
 	{
@@ -333,8 +343,6 @@ void ExpressionNode::mouseMoveEvent( QGraphicsSceneMouseEvent *e )
 
 		link->nodeMoved();
 	}
-
-	QGraphicsItem::mouseMoveEvent( e );
 }
 
 void ExpressionNode::createSlots( int count)
diff --git a/code/studio/src/plugins/gui_editor/expression_node.h b/code/studio/src/plugins/gui_editor/expression_node.h
index c2fa739de..1e0290344 100644
--- a/code/studio/src/plugins/gui_editor/expression_node.h
+++ b/code/studio/src/plugins/gui_editor/expression_node.h
@@ -68,9 +68,10 @@ public:
 	QString build() const;
 
 protected:
-	void mouseMoveEvent( QGraphicsSceneMouseEvent *e );
+	QVariant itemChange( GraphicsItemChange change, const QVariant &value );
 
 private:
+	void onNodeMove();
 	void createSlots( int count = 3 );
 	void paintSlots( QPainter *painter );